一部经，佛陀向婆罗门槟伽罗俱舍解说梵行的目标不在利养、名誉、戒行、禅定或知见，而唯在不死解脱，譬如树木的真正心材。

A discourse to the brahmin Piṅgalakoccha in which the Buddha explains that the goal of the holy life lies not in gain, esteem, virtue, concentration or insight, but in immortal deliverance alone, likened to the very heartwood of a tree.